Electromagnet structure.



W. W, DEAN. BLEOHQMAGNH STRUCTURE, APPLICATION lLED SEPT. 8,1004.

Patented jan. 19, 1915 COURT.

ELECTROLEAGNET STRUCTURE.

n fried September S, 1904.

Vf. Enfin, n es, residinget the L d r Si., in the eeninty iorein and State Chio, have invented `ertziin new and 'Lie pole or poles of the moved, und or He from sticking or Refer- ."lie ereerried n yoke. and the rtinn this yoke have heen yhe insir iden underlying all of there has been to torni n ferne eerie-,fing the magnet eores with their speels, :in-l also carrying' the armature and the permanent me et hy whit-h the parte rire polarized, in many enses it has heen proposed to niort the erin Eile nenn' 'i i iut this lziee the :ii-inw cores. in order der all condipecneaton of Letters Patent.

Patented Jan. 1&9, l.

Serial No, 23,688.

not only doing away with several superfluous elements, but strengthening the entire structure, :is the iron cores ivhen yoked together it both ends form n very strong and riOid lrnine. Mounting the support directly upon the cores, I then secure my adjustment. hy making them relatively movable. The most convenient well as the most reliable inethod of adjustment is by a serevv7 feed, but l have found that to produce the necessary screw threads in the iron core itself is somewhat expensive and not entirely sutislfiietery. therefore provide a sleeve, which Jfor convenience is formed upon one of the spool-heads. find herein lies the gist of my invention, for this sleeve serves both to support the yoke hy ineens of nuts threaded upon itself, and es n distance piece to prevent the armature 'from strikingl the end of the Core. This hitter func-tion is commonly perforated by e rivet of noninnfefuetie metal lit-ted in the end of the armature or by :i strip of similar metal ii'iteri'iosef between the :irinnture :ind Core. Mv devie is better liet-muse it requires no punching or drilling; of the parts` :ind because the nielnl spool-heads :i re 'forced upon the cores ineehnnimllv and hence een be set with undevintine' :ieeuruev to leive the end of the core. in everv ense e predetermined distance heloiv the end of the sleeve, thus securing uniformity in the nir gaps.

To nut it in :i \vord l nttnin my ohjeet hy iiirovifling :in armature yoke adjustiihly mounted upon the magnet spool-head, which proieets si lttlehevond the end of the core.

Mv invention is illustrated in the aecomimnvinf:` drawings, ivherein- Figure l is :i side view of a. complete ringer einhodviiig niy invention. Fig. 2 is a detail view of the armature :indits support ineA structure. with parts shown in section. Fig. 3 is :i side vieu' of :i stsindnrd telephone i'elziv vvith inv improved distance niece.

ln the driiwings, C, C are the iron cores oi; :i nziir ot ringer magnets, supported :ind rigidly connected et their lower ends hy the iron yoke her A. This lmr A serves :is the liaise tor the entire ringer structure. :ill the parts being sunnorted thereon und therefore hearing' :i definite relation to it sind to each other; however they innv he ndliusted. iion the opposite ends of this hnr mount the gong posts g, y, which carry goings G, G. Upon each core provide a suitable Winding W, Which is connected in circuit in the usual manner to be traversed by alternating or other suitable operating current, whereby to produce the proper' magnetic effects in the cores These windings are confined upon the cores between the spool-heads S and w, the latter being of suitable insulating material as usual. Lying beneath each of the upper heads S l provide an insulating auxiliary -head w', which prevents anv possibility of short-circuiting or grounding by the magnet Wind ings on the metal heads Between the gongs G playsl the clapper a2, carried upon the clapper rod a', which is rigidly connected at the opposite end to the" iron armature A, overlying the magnet poles, and supported by pivot screws a3 carried in the upturned ears a4 of the yoke af. This yoke is of non-magnetic-metal, of sufficient length to span the ends of the cores C, and

at cach end is provided with a circular open.-

ing a5 forming aring which encircles the end of one of the cores. Each spoolhead S has an upwardly extending sleeve S', which may be formed integral with the head, as shown in the left'handv side of Fig. 2, or may be formed separately and riveted or otherwise secured to the head'as shown at 82 in the right hand side of Fig. 2.

thereto are the nuts or screw-rings s, s', of hexagonal orother convenient shape to be set up by a wrench. The ends of the yoke a encircles the' sleeves S', and each lies between'one pair of the adjusting nuts or rings s, s.

The armature A when made according to my invention is unprovided with copper rivets or otherdistance devices, being left plain in this respect. lts-ends are prevented from striking the magnet poles, however, by

i :the upper edges of the sleeves ST, which project a shortdistauce beyond the ends of the cores C, Jforming a clrcumscribed definite air rap The yoke a, spool-heads S.l

sleeves S adjusting rings s, are all formed i of non-magnetic metalsuch as brass; hence there is no Ypossibility of the armature either striking the ends of the cores C or sticking to any of the parts carriedrthereby;

The armature A and the cores (l, C are polarized by means'of a permanent magnet M, both of Whose ends are returned or bent, over, thc lower one, m, being suitably attached to the yoke bar A', and the upper one overlying the armature A. It will be observed that while I have thus reduced the number of'parts of my frame, I have preserved'- its ri idity, and have provided for maximum e ciency. The upper arm of the permanent magnet M may be brought down to lie as close to the armature as the limits of adjustment will permit.

After assembling the ringer l have lthus surrounding thecore extends a sho 'scope ol my invention.

Eachsleeve S is externally threaded, and fitted broadly, and I Wish it distinctly 'Junderstoec changes and applications are contemplated described, the proper armature adjustment is secured by manipulating the threaded' rings or nuts s, s, and these are then set up tightly, binding the yoke a' between them' and rendering the adjustment permanent and reliable` v In Fig. 3 I have shown my non-magnetic spoolhead applied tothe core 2 of a' stamdard telephone relay. ln this case the armature l is shown supported upon the frame 7 of the relay, so'as to be directly included in the magnetic circuit. lt may obviously be carried upon a yoke or frame supported upon the spool-head 3, however, inthe same manner as shown with respect te tlf' i'n'Fig. l. The circular flange or s tance beyond-the end of the latten-as' ringer, forming a fixed and predeterm air gap. ln this or any other case the a gap may be made adjustable7 if desired, making the sleeve or iange' movable up the head,'by.making the latter movable upon the core, being forced upon and supp rted bythe cores of the magnets, but itis e that this is not essentiahas manywa be resorted to without departing rr The essential tures of my invention consist in the afin able support of the armature yoke upon i upperrspool-heads. and in the projection o5, the spool-head sleeves to form die pieces. These features l have clai that l am fully aware of the possibility changing non-essential features of construe tion, and ot applying' the essential feature to other forms of magnet than those l hav. herein shown .and described. All suol by me as within the scope and purview my invention and of my claims. Y

Having thus described my invention what' I. claim and desire to secure by Letters figajtNv ent is: l.

l. An electromagnetic structure compris ing a core, a Winding, a spool head, supperting means integral with the spool head and encircling the core, clamping means carried therebv'and an armature supportA ein ber adiustably lsupportedin eper: tion to the core by such support clamping means.

Q. Arrelectromagnetie structure comL ing a magnet spool, heads therefor, a e, supporting means carried by ene 'sind heads and encircling the core o sain. magnet,and an armature supporting means edf justably supported in operative re the core by such supporting means.

3. In an electromagnet structure, a spool head upon. 'the core, supper means mounted on the spool head and 1. circling the core, an armature sup ort justing means therefor mounted -1 o J. n

^ spool.

menace nature support. I d. electromagnetstructure comprising core, a spoolhead having a sleeve encirsaid core, a supporting yoke adjustabiy mounted onsaid sleeve, and an arma- 1 Ae carried uponsaid yoke in operative retion to said core. 5. eiectromagnet structure comprising core, spool-head having a sleeve surrounding said core and provided with screw-threads, an armature support having portion encircling saidsleeve, nuts clamping the same thereon, and an armature earried upon said support.

ti. eiect'romagnet structure comprising a, core, an armature in operative relation uid a spool-head encircling the core i i end and provided With a projectportion adapted to limit the approach or he armature to the core.

Y. mi electromagnet structure comprising a c re and a Windingthereor, an armature s in operativerelation to the core, a spool- .iiead thereon, a non-magnetic sleeve surrounding the end of the core and extending into position 'to limit the approach of the armature thereto.

eiectroinag'net structure comprising dia. Winding therefor, an armature tive relation to the core, and a '.08 A opera ooi-head having a non-magnetic sleeve eX- 'iding beyond the end of the core.

. in electromagnet structure comprising core, a spoo` neadthereon Aformed of noninagnetic material and provided with. a leere extenda/1 gy beyond the core, an armature support adjustahly'mounted upon said sleeve, and an armature carried upon said support.

i0, .fle ringer comprising a pair of cores anda. yoke bar connecting them at one end,

heads for the cores mounted at the opposite ends thereof, a yoke extending across l adjustably secured upon the heads and un armature carried upon the yoke.

spool-heads, adjusting and locking means said yoke.

12. An electric bell comprising a yoke bar, gongs carried upon said bar, a pair of electromagnets also carried upon said bar, a pair of spool-heads for said magnets having screw-threaded sleeves, a yoke having its ends perforated and encircling the sleeves, nuts upon said sleeves to adjust and lock the yoke thereon, and an armature pivotally supported upon said yoke.

1B. An electric bell comprising a frame, gongs supported upon said frame, a pair of electromagnets also supported upon the frame, spool-heads for said magnets of nonmagnetic material and provided With projecting sleeves surrounding and extending beyond the cores of the magnets, e yoke supported upon said sleeves, and an armature pivoted upon said yoke in operative relation to the magnets, together with a clapper actuated by the armature, substantially as described.

la. An electromagnet structure comprising a core and an armature, a non-magnetic supporting device surrounding the core having a projection adapted to prevent Contact between the armature and core, together with means to connect the armature adjustably through said support with the core, substantially as described.

lo. lin a magneto-bell ringer, the combination of electromagnets havingcores presenting projecting end portions, supporting sleeves carried by said end portions, an armature. support comprising a yoke having openings to receive said sleeves, and adjustable nuts on each of said sleeves clamping the yoke between them.

a spool head on said core, a supporting means integral with said spool-head, an adjustable member on said supporting member, an armature and an armature support carried by said adjustable member.

ln'testnnony whereof i ailix my signature in lpresence of two Witnesses.

l/TLLIAM W. DEN.

`Witnesses vRAY H. Munson,

S. A. Bernini). 

